Randomized controlled trial on the efficiency in removal of dental plaque related to changes of bristles' hardness of toothbrushes, Tuft 24 Soft and Medium

Randomized controlled trial on the efficiency in removal of dental plaque related to changes of bristles' hardness of toothbrushes, Tuft 24 Soft and Medium - Clinical trial on the efficiency in removal of dental plaque related to changes of bristles' hardness of toothbrushes

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000025133

Enrollment

Registered

2016-12-02

Start date

2016-12-02

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy volunteers belonging to Hiroshima University

Interventions

Subjects are healthy volunteers belonging to Hiroshima University. They are classified into 2 groups. One group consists of people relating to Course of Oral Science, while the other one consists of p

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Undergraduate and postgraduate students studying at Kasumi campus of Hiroshima University fulfilling the following criteria; 1) Persons from 18 to 40 years old 2) Persons who agree to participate in this study with document. 3) Persons who have 18 teeth or more.

Exclusion criteria

Exclusion criteria: 1) Persons who have crown restoration in several teeth or orthodontic appliances in the oral cavity. 2) Persons who receive treatment affecting oral condition in a medical clinic at present. 3) Women who are pregnant or supposed to be pregnant. 4) Persons who have been determined not to be suitable as subjects of this study 5) Persons who were classified into those requiring dental treatment based on a questionnaire and an intraoral examination before the study

Design outcomes

Primary

Measure	Time frame
Percentage of dental plaque removal: PCR (Plaque Control Record) just before continuous use of an allocated toothbrush and 1, 2 and 3 month after use of it	—

Secondary

Measure	Time frame
Just before continuous use of an allocated toothbrush and 1, 2 and 3 month after use of it, 1. Percentage of dental plaque removal PHP (Patient Performance Record) 2. Hardness of toothbrush bristles 3. Frequency of tooth brushing during the study duration 4. Pressure of a toothbrush 5. Food during the period without tooth brushing 6. Area of worn toothbrush 7. Plaque area measurement 8.An investigation of deep learning using the bristle splaying image 9.1Evaluation of bristle abrasion using a SEM	—

Measure

Time frame

Just before continuous use of an allocated toothbrush and 1, 2 and 3 month after use of it, 1. Percentage of dental plaque removal PHP (Patient Performance Record) 2. Hardness of toothbrush bristles 3. Frequency of tooth brushing during the study duration 4. Pressure of a toothbrush 5. Food during the period without tooth brushing 6. Area of worn toothbrush 7. Plaque area measurement 8.An investigation of deep learning using the bristle splaying image 9.1Evaluation of bristle abrasion using a SEM

—

Countries

Japan

Contacts

Public ContactYoshino Kaneyasu

Hiroshima University Dept. of Public Oral Health, Graduate School of Health & Biomedical Sciences

yoshi-kane@hiroshima-u.ac.jp082-257-5957

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026

Randomized controlled trial on the efficiency in removal of dental plaque related to changes of bristles&#39; hardness of toothbrushes, Tuft 24 Soft and Medium